/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.bff.gaia.table.plan.rules.dataSet

import org.apache.calcite.plan.{RelOptRule, RelTraitSet}
import org.apache.calcite.rel.RelNode
import org.apache.calcite.rel.convert.ConverterRule
import com.bff.gaia.table.plan.nodes.GaiaConventions
import com.bff.gaia.table.plan.nodes.dataset.DataSetMinus
import com.bff.gaia.table.plan.nodes.logical.GaiaLogicalMinus

class DataSetMinusRule
  extends ConverterRule(
    classOf[GaiaLogicalMinus],
    GaiaConventions.LOGICAL,
    GaiaConventions.DATASET,
    "DataSetMinusRule") {

  def convert(rel: RelNode): RelNode = {

    val minus: GaiaLogicalMinus = rel.asInstanceOf[GaiaLogicalMinus]
    val traitSet: RelTraitSet = rel.getTraitSet.replace(GaiaConventions.DATASET)
    val convLeft: RelNode = RelOptRule.convert(minus.getInput(0), GaiaConventions.DATASET)
    val convRight: RelNode = RelOptRule.convert(minus.getInput(1), GaiaConventions.DATASET)

    new DataSetMinus(
      rel.getCluster,
      traitSet,
      convLeft,
      convRight,
      rel.getRowType,
      minus.all)
  }
}

object DataSetMinusRule {
  val INSTANCE: RelOptRule = new DataSetMinusRule
}
